Shelf



FIG. 1 is a top perspective view of a shelf;

FIG. 2 is a bottom perspective view of the shelf shown in FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

The broken lines in the drawings form no part of the claimed design.

The ornamental design which is claimed is shown in solid lines in thedrawings.

CLAIM The ornamental design for a shelf, as shown and described.